ECTI Transactions on Computer and Information Technology (ECTI-CIT)

Enhancement of Machine Learning Algorithm in Fine-grained Sentiment Analysis Using the Ensemble

2025-01-02T11:07:37+07:00

Fine-grained sentiment analysis plays a crucial role in extracting subtle opinions from textual data, especially in domains such as customer reviews and social media analysis. Traditional machine learning models, including Support Vector Machines (SVM), Naïve Bayes, and Decision Tree, often face limitations in accurately classifying fine-grained sentiments due to their inability to generalize well in complex classication tasks. To address this challenge, this study proposes an ensemble learning approach integrating voting, bagging, boosting, and stacking to enhance sentiment classification performance. Experiments were conducted on multiple datasets, comparing standalone classiers and ensemble-based approaches. The results indicate that stacking-based ensemble models achieve the highest accuracy, reaching 92.45%, outperforming traditional classiers such as SVM (88.23%) and Naïve Bayes (85.67%). Additionally, ensemble methods demonstrate improved generalization and robustness, reducing misclassification rates by 6% on average compared to individual classifiers. Among the tested ensemble techniques, stacking consistently delivered superior results, leveraging diverse weak learners to optimize sentiment classication accuracy. This research highlights the eectiveness of ensemble learning in fine-grained sentiment analysis, oering a robust methodology for improving classication accuracy and reducing sentiment misclassication. The ndings suggest that ensemble approaches, particularly stacking, provide a more reliable and scalable solution for sentiment analysis tasks, making them suitable for real-world applications in natural language processing.

Development of a Semantic Ontology for Knowledge of Ancient Lanna Documents

2025-01-02T10:53:01+07:00

This study is a research and development project aimed at developing a semantic ontology for ancient Lanna documents. It focuses on building a structured relationship of knowledge by analyzing information from various documents and databases, including the research database, the online information resource database (OPAC), the Northern Thai Information Center of the Chiang Mai University Library, the online information resource database of Rajamangalaphisek National Library, Chiang Mai, the online information resource database (OPAC) of the National Library of Thailand, the Oce of Arts and Culture, Chiang Mai Rajabhat University, and the online database from Sirindhorn Anthropological Center. This research tackles inefficiencies in retrieving and managing information on ancient Lanna documents through the development of a semantic ontology. The aim is to enhance the organization, classification, and accessibility of these documents, thereby improving search capabilities and knowledge dissemination. The innovation of this research lies in the development and evaluation of a semantic ontology specifically tailored for ancient Lanna documents. This ontology facilitates more effective grouping, categorization, and retrieval of information, significantly enhancing access to and utilization of ancient knowledge. A key innovation of this research is the application of ontology and semantic web technologies to the study of ancient Lanna documents. The research presents a structured approach to developing and validating the ontology, utilizing tools like Protégé and involving expert evaluations to ensure accuracy and relevance. The research process is divided into three stages. Stage 1 involves determining the need for an ontology by analyzing online data and grouping related keywords and phrases through the study of various information resources, including digital collections of ancient Lanna documents. Stage 2 focuses on developing the ontology using the Protégé program, which involves designing classes, setting main classes, subclasses, hierarchies, and properties to create data relations within each class. Stage 3 encompasses the ontology assessment, which is divided into two parts: evaluating the appropriateness of the ontology structure by experts through a questionnaire on class correlation validity and assessing word grouping in ancient Lanna documents. The study's findings indicate that the identication of denitions, scope, and development objectives is appropriate (mean score = 0.88), with high scores in class grouping and ordering (score = 0.90), naming relationships and properties (score = 0.90), and the overall preciseness and appropriateness of the ontology development for ancient Lanna documents (score = 0.89).

Enhanced Hand Vein Segmentation Using Generative Adversarial Network Integrated with Modied ECA Module

2025-01-16T15:14:14+07:00

Hand vein image segmentation is crucial for diverse applications such as precise biometric identification and facilitating medical intravenous procedures. This paper introduces an enhanced hand vein image segmentation method utilizing deep learning, specifically a conditional generative adversarial network (cGAN). The cGAN is trained adversarially and augmented with a modied ecient channel attention (ECA) mechanism module. The efficiency of the proposed technique was evaluated using four hand vein datasets: self-acquired dataset, SUAS, WILCHES, and BOSPHORUS. Performance comparison reveals that the proposed method outperforms alternative approaches, achieving the best results across all datasets with an average sensitivity of 0.8878, average accuracy of 0.9639, and average dice coeffcient of 0.7904 for vein patterns. Our experimental findings demonstrate that the proposed segmentation technique significantly enhances hand vein patterns and improves dorsal hand vein detection accuracy.

Machine Learning Model for Predicting the Suitability of Cultivating Alternative Crops in Lower Northern Thailand

2024-12-26T17:12:20+07:00

Intensive rice cultivation presents significant environmental and economic challenges. While crop diversification offers potential benefits for agricultural sustainability and financial resilience, farmers face considerable uncertainty when transitioning to alternative crops. This study assessed the prediction efficacy of machine learning (ML) models in identifying suitable crops for cultivation in a specific geographical area considering various factors influencing agricultural viability. Through comprehensive experimentation, a decision tree model, an artificial neural network (ANN), and a Naïve Bayes model were used for predictions and rigorously evaluated for various crops, including rubber, coconut, longan, durian, rambutan, and mangosteen. Various hyperparameter configurations were tested, and multiple evaluation indicators were employed to assess the prediction performance of the models. The results consistently demonstrated the superiority of the decision tree model, which exhibited high accuracy, precision, recall, and F-measure across most crops. Its ability to capture intricate patterns and relationships between crop attributes and suitability levels underscores its value as a decision-support tool in agriculture. While the ANN model performed well for coconut, its effectiveness varied across the other crops, highlighting the need for tailored model selection. This study provides valuable insights into the application of ML in agricultural decision-making processes, suggesting potential avenues for future optimization and enhancement of prediction accuracy.

Multi-Task Learning with Fusion: Framework for Handling Similar and Dissimilar Tasks

2025-01-16T14:58:25+07:00

Multi-Task learning (MTL), which emerged as a powerful concept in the era of machine learning deep learning, employs a shared model trained to handle multiple tasks at simultaneously. Numerous advantages of this novel approach inspire us to instigate the insights of various tasks with similar (Identification of Sentiment, Sarcasm, Hate speech, Oensive language, etc.) and dissimilar (Identification of Sentiment, Claim, Language) genres. This paper proposes two Multi-Task Learning (MTL) framework schemes based on Bidirectional LSTM (BiLSTM) to handle both similar and dissimilar tasks. The performance of these frameworks is evaluated and compared against standalone classifiers, demonstrating their effectiveness in improving classification accuracy. In order to train our proposed MTL frameworks, different task-related publicly available datasets were collected, and each sentence was annotated with all task labels with the help of publicly available pre-trained models. Along with a simple MTL framework, this paper presents an MTL framework with a fusion technique (MTL fusion) that combines learning from task-specific layers to make predictions. Our proposed MTLfusion framework provides an F1 score of 0.76, 0.92, 0.809, 0.798, and 0.89 for sentiment, sarcasm, irony, hate speech, and offensive language classification tasks, respectively (similar tasks). It also provides an F1 score of 0.59, 0.586, and 0.707 for claim, sentiment, and language identification tasks, respectively. Our research also shows that MTL frameworks perform better than their corresponding standalone classifiers for similar tasks. On the other hand, for dissimilar tasks, the standalone classifiers perform better than MTL frameworks.